LXR linux/include/uapi/linux/ipv6.h

   1#ifndef _UAPI_IPV6_H
   2#define _UAPI_IPV6_H
   3
   4#include <linux/libc-compat.h>
   5#include <linux/types.h>
   6#include <linux/in6.h>
   7#include <asm/byteorder.h>
   8
   9/* The latest drafts declared increase in minimal mtu up to 1280. */
  10
  11#define IPV6_MIN_MTU    1280
  12
  13/*
  14 *      Advanced API
  15 *      source interface/address selection, source routing, etc...
  16 *      *under construction*
  17 */
  18
  19#if __UAPI_DEF_IN6_PKTINFO
  20struct in6_pktinfo {
  21        struct in6_addr ipi6_addr;
  22        int             ipi6_ifindex;
  23};
  24#endif
  25
  26#if __UAPI_DEF_IP6_MTUINFO
  27struct ip6_mtuinfo {
  28        struct sockaddr_in6     ip6m_addr;
  29        __u32                   ip6m_mtu;
  30};
  31#endif
  32
  33struct in6_ifreq {
  34        struct in6_addr ifr6_addr;
  35        __u32           ifr6_prefixlen;
  36        int             ifr6_ifindex; 
  37};
  38
  39#define IPV6_SRCRT_STRICT       0x01    /* Deprecated; will be removed */
  40#define IPV6_SRCRT_TYPE_0       0       /* Deprecated; will be removed */
  41#define IPV6_SRCRT_TYPE_2       2       /* IPv6 type 2 Routing Header   */
  42
  43/*
  44 *      routing header
  45 */
  46struct ipv6_rt_hdr {
  47        __u8            nexthdr;
  48        __u8            hdrlen;
  49        __u8            type;
  50        __u8            segments_left;
  51
  52        /*
  53         *      type specific data
  54         *      variable length field
  55         */
  56};
  57
  58
  59struct ipv6_opt_hdr {
  60        __u8            nexthdr;
  61        __u8            hdrlen;
  62        /* 
  63         * TLV encoded option data follows.
  64         */
  65} __attribute__((packed));      /* required for some archs */
  66
  67#define ipv6_destopt_hdr ipv6_opt_hdr
  68#define ipv6_hopopt_hdr  ipv6_opt_hdr
  69
  70/* Router Alert option values (RFC2711) */
  71#define IPV6_OPT_ROUTERALERT_MLD        0x0000  /* MLD(RFC2710) */
  72
  73/*
  74 *      routing header type 0 (used in cmsghdr struct)
  75 */
  76
  77struct rt0_hdr {
  78        struct ipv6_rt_hdr      rt_hdr;
  79        __u32                   reserved;
  80        struct in6_addr         addr[0];
  81
  82#define rt0_type                rt_hdr.type
  83};
  84
  85/*
  86 *      routing header type 2
  87 */
  88
  89struct rt2_hdr {
  90        struct ipv6_rt_hdr      rt_hdr;
  91        __u32                   reserved;
  92        struct in6_addr         addr;
  93
  94#define rt2_type                rt_hdr.type
  95};
  96
  97/*
  98 *      home address option in destination options header
  99 */
 100
 101struct ipv6_destopt_hao {
 102        __u8                    type;
 103        __u8                    length;
 104        struct in6_addr         addr;
 105} __attribute__((packed));
 106
 107/*
 108 *      IPv6 fixed header
 109 *
 110 *      BEWARE, it is incorrect. The first 4 bits of flow_lbl
 111 *      are glued to priority now, forming "class".
 112 */
 113
 114struct ipv6hdr {
 115#if defined(__LITTLE_ENDIAN_BITFIELD)
 116        __u8                    priority:4,
 117                                version:4;
 118#elif defined(__BIG_ENDIAN_BITFIELD)
 119        __u8                    version:4,
 120                                priority:4;
 121#else
 122#error  "Please fix <asm/byteorder.h>"
 123#endif
 124        __u8                    flow_lbl[3];
 125
 126        __be16                  payload_len;
 127        __u8                    nexthdr;
 128        __u8                    hop_limit;
 129
 130        struct  in6_addr        saddr;
 131        struct  in6_addr        daddr;
 132};
 133
 134
 135/* index values for the variables in ipv6_devconf */
 136enum {
 137        DEVCONF_FORWARDING = 0,
 138        DEVCONF_HOPLIMIT,
 139        DEVCONF_MTU6,
 140        DEVCONF_ACCEPT_RA,
 141        DEVCONF_ACCEPT_REDIRECTS,
 142        DEVCONF_AUTOCONF,
 143        DEVCONF_DAD_TRANSMITS,
 144        DEVCONF_RTR_SOLICITS,
 145        DEVCONF_RTR_SOLICIT_INTERVAL,
 146        DEVCONF_RTR_SOLICIT_DELAY,
 147        DEVCONF_USE_TEMPADDR,
 148        DEVCONF_TEMP_VALID_LFT,
 149        DEVCONF_TEMP_PREFERED_LFT,
 150        DEVCONF_REGEN_MAX_RETRY,
 151        DEVCONF_MAX_DESYNC_FACTOR,
 152        DEVCONF_MAX_ADDRESSES,
 153        DEVCONF_FORCE_MLD_VERSION,
 154        DEVCONF_ACCEPT_RA_DEFRTR,
 155        DEVCONF_ACCEPT_RA_PINFO,
 156        DEVCONF_ACCEPT_RA_RTR_PREF,
 157        DEVCONF_RTR_PROBE_INTERVAL,
 158        DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
 159        DEVCONF_PROXY_NDP,
 160        DEVCONF_OPTIMISTIC_DAD,
 161        DEVCONF_ACCEPT_SOURCE_ROUTE,
 162        DEVCONF_MC_FORWARDING,
 163        DEVCONF_DISABLE_IPV6,
 164        DEVCONF_ACCEPT_DAD,
 165        DEVCONF_FORCE_TLLAO,
 166        DEVCONF_NDISC_NOTIFY,
 167        DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL,
 168        DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL,
 169        DEVCONF_SUPPRESS_FRAG_NDISC,
 170        DEVCONF_ACCEPT_RA_FROM_LOCAL,
 171        DEVCONF_USE_OPTIMISTIC,
 172        DEVCONF_ACCEPT_RA_MTU,
 173        DEVCONF_STABLE_SECRET,
 174        DEVCONF_USE_OIF_ADDRS_ONLY,
 175        DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT,
 176        DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
 177        DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
 178        DEVCONF_DROP_UNSOLICITED_NA,
 179        DEVCONF_KEEP_ADDR_ON_DOWN,
 180        DEVCONF_RTR_SOLICIT_MAX_INTERVAL,
 181        DEVCONF_MAX
 182};
 183
 184
 185#endif /* _UAPI_IPV6_H */
 186